Registering custom post types in Wordpress - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What is the output of this custom post type registration?

Consider the following WordPress code snippet that registers a custom post type. What will be the slug used in the URL for this post type?

Wordpress

<?php
function create_book_post_type() {
  register_post_type('book', [
    'labels' => [
      'name' => __('Books'),
      'singular_name' => __('Book')
    ],
    'public' => true,
    'has_archive' => true,
    'rewrite' => ['slug' => 'library']
  ]);
}
add_action('init', 'create_book_post_type');
?>

A The URL slug will be '/library/'

B The URL slug will be '/book/'

C The URL slug will be '/books/'

D The URL slug will be '/archive/'

💡 Hint

Look at the 'rewrite' argument in the register_post_type function.

The 'rewrite' argument with 'slug' => 'library' sets the URL slug to '/library/'. This overrides the default slug which would be the post type name 'book'.

❓ state_output

intermediate

What is the value of 'publicly_queryable' for this post type?

Given this registration code, what is the value of the 'publicly_queryable' property for the 'movie' post type?

Wordpress

<?php
function create_movie_post_type() {
  register_post_type('movie', [
    'public' => false,
    'show_ui' => true
  ]);
}
add_action('init', 'create_movie_post_type');
?>

A true

B false

C null

D undefined

💡 Hint

Check how 'public' affects 'publicly_queryable' by default.

If 'public' is set to false, 'publicly_queryable' defaults to false unless explicitly set to true.

📝 Syntax

advanced

Which option will cause a syntax error when registering a custom post type?

Identify the option that contains a syntax error in the register_post_type call.

A register_post_type('event', ['public' => true, 'labels' => ['name' => 'Events']]);

B register_post_type('event', ['public' => true, 'labels' => ['name' => 'Events']])

C ;)]]'stnevE' >= 'eman'[ >= 'slebal' ,eurt >= 'cilbup'[ ,'tneve'(epyt_tsop_retsiger

D register_post_type('event' ['public' => true, 'labels' => ['name' => 'Events']]);

💡 Hint

Look carefully at the commas separating arguments.

Option D is missing a comma between the first and second argument, causing a syntax error.

🔧 Debug

advanced

Why does this custom post type not appear in the admin menu?

This code registers a custom post type but it does not show up in the WordPress admin menu. What is the cause?

Wordpress

<?php
function create_album_post_type() {
  register_post_type('album', [
    'public' => false,
    'show_ui' => false
  ]);
}
add_action('init', 'create_album_post_type');
?>

A Missing 'menu_position' causes it to not appear in admin menu.

B 'public' is false, so the post type cannot be registered.

C 'show_ui' is set to false, so the admin menu link is hidden.

D The 'init' hook is incorrect for registering post types.

💡 Hint

Check the 'show_ui' argument's effect on admin menu visibility.

Setting 'show_ui' to false hides the post type from the admin menu even if registered.

🧠 Conceptual

expert

Which option best describes the effect of 'has_archive' => true in register_post_type?

What does setting 'has_archive' to true do for a custom post type in WordPress?

A Enables an archive page listing all posts of this type accessible via a URL.

B Automatically creates a new database table for the post type.

C Registers the post type only for admin users.

D Makes the post type publicly queryable but disables single post views.

💡 Hint

Think about what an archive page means on a website.

'has_archive' => true creates a URL where all posts of that type are listed, like a blog archive page.